Mac and Windows only: Spruce up the functionality and aesthetics of your screeensaver with Fliqlo. Fliqlo mimics an old school clock with flipping digits. The time can be customized to display in 12-hour or 24-hour formats. Additionally, you can customize the zoom using the up and down arrow keys. Fliqlo is a free screensaver that has been around for ages but never made an appearance on Lifehacker. Not into the clock? We've posted a fewotherscreensaversyou might like. Fliqlo is a free download for Mac and Windows only.